90 percent AFUE oil furnace
Although gas furnaces are the most common type, a significant number of homes have oil furnaces, especially in the Northeast, where access to natural gas may be limited. Oil-burning furnaces are less efficient on average than gas furnaces, but they can have AFUEs as high as 95 percent. An oil furnace with an AFUE of 95 percent . As with gas furnaces, an efficient oil furnace will cost more to install but will use less fuel over time. One factor that is different with oil furnaces is CO2 emissions. For example, upgrading from a 56 percent AFUE furnace to a 90 percent AFUE furnace will reduce CO2 emissions by 2.5 tons per year with oil heat, but only 1.5 tons with gas heat. This makes an energy-efficient oil furnace a good choice for those who have oil heat and are concerned about pollution.
See our full review
*Est. installed cost $2,000 and up